If the replacement screws held, we have to conclude that the failed
screws
were the wrong grade of steel. I assume you are sure the conversion
from US
specs (inch pounds?) to European specs (dyne cm?) were done correctly?
It seems that the screws were weaken (heat ?). The torque was 15 to
20 ft.lbs (we have a torque wrench with US scale) and the screws broke
before, perhaps at 5 ft.lbs.
B/T/W.......I wouldn't re-use the rear clutches, even if they appeared good. The clutch materail is absorbent, and still could be mixed with water. I'd not want to take a chance; changing them is cheap compared to rebuilding again.
We've put new rear clutches (and new rings, new gasket, etc..)
--
Philippe COURANT (Pau, France)
Imperial 57 Crown convertible
Buick 58 Roadmaster sedan
- American Car Club de France (ACCF) : http://www.accf.com
- Chrysler Imperial France : http://www.ifrance.com/c-i-f
- Cadillac " Standard of Excellence " : http://www.ifrance.com/accf-cad
- SportsCars : http://www.ifrance.com/accf-sprtcar